2.4.1.92 (N-acetylneuraminyl)-galactosylglucosylceramide N-acetylgalactosaminyltransferase neuroepithelial cell - 3.4.15.1 peptidyl-dipeptidase A neuroepithelial cell - 3.4.21.26 prolyl oligopeptidase neuroepithelial cell - 4.4.1.1 cystathionine gamma-lyase neuroepithelial cell -